After having played around with "prime-select" instead of using the
graphical Nvidia tool my system now also boots in "on-demand" mode.
(You have to reboot after changing the settings with "prime-select".)
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The problem persists with Kernel 5.8.0-50, but I found out that it only
occurs if the usage of the Nvidia GPU is set to "on-demand".
In pure Intel or Nvidia mode the system boots as expected.
The mode van be set via graphical Nvidia tool or via "prime-select
{nvidia|intel|on-demand|query}".
I have these installed:
dpkg -l | grep "linux\-[a-z]*\-"
rc linux-modules-extra-5.4.0-42-generic 5.4.0-42.46
ii linux-modules-extra-5.4.0-58-generic 5.4.0-58.64
ii linux-modules-extra-5.8.0-36-generic 5.8.0-36.40~20.04.1
ii linux-modules-extra-5.8.0-38-generic
Maybe contains extra information.
** Attachment added: "Xorg.0.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1911352/+attachment/5453569/+files/Xorg.0.log
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I have the same problem on my Acer.
Since Kernel 5.8.0-36 and also 5.8.0-38 Ubuntu 20.04.1 cannot start in graphics
mode.
(It is possible to log in on the console using e.g. Ctrl+Alt+F4 though.)
With Kernel 5.4.0-58 the system works as expected.
The problem occurs only on this system, which is
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